Question

Review I Constants I P Chemical energy is released or absorbed from reactions in Part A various forms. The most easily measurable form of energy comes in the form of heat, or enthalpy. The enthalpy of a reaction can be calculated from the heats of formation of the Calculate the standard enthalpy change for the reaction substances involved in the reaction: 2AB2C +2D ΔΗΣ n,ΔΗ (products)-Σn, ΔΗ (reactants) Use the following data: where n represents the stoichiometric coefficients ΔΗ (kJ/mol) Substance -265 В -375 215 -485 Express your answer to three significant figures and include the appropriate units View Available Hint(s) ? HA AHp Value Units

Answer 1

equutions 2A + B 21+ 2D. Ahorn 2 we can find the Monxn by following formule Hayn PHS (produch) - DHi Creactant) s Harna (2X DH (c) + 2X DH ; (D). - 2x DHg (A) + 1X DH, (B1). from table - (2x (215) + 2x1-455)) :-(2*(-265) + (-375)) -suo-(-905) k5 mol 86 Дилър